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drm/nouveau/core: allow detected chipset to be overridden 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
hifive-unleashed-5.2
Ben Skeggs 2019-05-09 16:48:50 +10:00
parent a0b694d0af
commit a2ac09a03d
2 changed files with 24 additions and 3 deletions
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3
drivers/gpu/drm/nouveau/nouveau_drm.c
View File

@ -631,7 +631,8 @@ static int nouveau_drm_probe(struct pci_dev *pdev,
/* We need to check that the chipset is supported before booting
* fbdev off the hardware, as there's no way to put it back.
*/
ret = nvkm_device_pci_new(pdev, NULL, "error", true, false, 0, &device);
ret = nvkm_device_pci_new(pdev, nouveau_config, "error",
true, false, 0, &device);
if (ret)
return ret;

24
drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
View File

@ -2824,8 +2824,8 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
u64 mmio_base, mmio_size;
u32 boot0, strap;
void __iomem *map;
int ret = -EEXIST;
int i;
int ret = -EEXIST, i;
unsigned chipset;
mutex_lock(&nv_devices_mutex);
if (nvkm_device_find_locked(handle))
@ -2870,6 +2870,26 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
strap = ioread32_native(map + 0x101000);
iounmap(map);
/* chipset can be overridden for devel/testing purposes */
chipset = nvkm_longopt(device->cfgopt, "NvChipset", 0);
if (chipset) {
u32 override_boot0;
if (chipset >= 0x10) {
override_boot0 = ((chipset & 0x1ff) << 20);
override_boot0 |= 0x000000a1;
} else {
if (chipset != 0x04)
override_boot0 = 0x20104000;
else
override_boot0 = 0x20004000;
}
nvdev_warn(device, "CHIPSET OVERRIDE: %08x -> %08x\n",
boot0, override_boot0);
boot0 = override_boot0;
}
/* determine chipset and derive architecture from it */
if ((boot0 & 0x1f000000) > 0) {
device->chipset = (boot0 & 0x1ff00000) >> 20;